Chapter 15

Question 1

Rods

Answer 1

dim light, peripheral vision receptors

Question 2

Cones

Answer 2

vision receptors for bright light and high-resolution color vision

Question 3

Symptoms of labyrinthitis

Answer 3

balance issues, vertigo, vomiting, dizziness

Question 4

Another name for internal ear

Answer 4

labyrinth (maze)

Question 5

Bony labyrinth

Answer 5

system of tortuous channels and cavities that worm through the bone

Question 6

Three regions of internal ear

Answer 6

vestibule, semicircular canals, and cochlea

-filled with perilymph fluid

Question 7

Membranous labyrinth

Answer 7

series of membranous sacs and ducts contained in body labyrinth, filled with potassium-rich endolymph

Question 8

What do the internal ear sacs house?

Answer 8

equilibrium receptor regions (maculae) that respond to gravity and changes in position of head

Question 9

In order to smell substances

Answer 9

it must be volatile

Question 10

Volatile

Answer 10

must me in gaseous state and be able to dissolve in olfactory epithelium fluid

Question 11

Action of olfactory sensory neurons

Answer 11

dissolved odorants bind to receptor proteins in olfactory cilium membranes

Question 12

Activation of taste receptors

Answer 12

binding of food chemical depolarizes cell membrane of gustatory epithelial cell membrane, causing release of neurotransmitter